Eunsoo Lim secured her first national title in 2017, following a swift rise through the competitive figure skating ranks after beginning her career in 2009. She made her senior national debut during the 201415 season and showcased her international potential early on, earning a bronze medal at the 2016 ISU Junior Grand Prix Germany and a silver medal at the 2017 ISU Junior Grand Prix Austria. Lim consistently demonstrated her formidable skill on the international junior circuit, placing within the top five at the World Junior Championships in both 2017 and 2018, solidifying her reputation as a rising star. Her senior international career commenced with a breakout 201819 season, where Lim achieved multiple significant milestones.
She earned a gold medal at the 2018 CS Asian Open Trophy, a silver at the 2018 CS U.S. International Figure Skating Classic, and her first senior Grand Prix medal, a bronze, at the prestigious 2018 Rostelecom Cup. This season also included a strong fourth-place finish at the Four Continents Championships and a notable tenth-place finish at the 2019 World Championships. Continuing her impressive streak, Lim also secured a gold medal at the 2019 CS Asian Open Trophy, a bronze at the 2019 CS Autumn Classic International, and another bronze at the 2019 Shanghai Trophy before retiring from competitive figure skating on July 11, 2023.
Her commitment to the sport extends to upcoming performances, including a special appearance alongside fellow retired skaters Choi Da-bin and Wi Seoyeong at the 2025 Four Continents Championships gala in Seoul. Balancing her diverse career, Lim is also actively pursuing an education in sports business, further solidifying her trajectory as a multi-faceted professional in the global sports and entertainment industry.